Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B35164.1 |
Sequence stratigraphy and depositional history of the Baranof Fan: Insights for Cordilleran Ice Sheet outflow to the Gulf of Alaska | |
Zhang, Jiajia1,3; Gulick, Sean P. S.1,2 | |
2020 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2020 |
卷号 | 132期号:1-2页码:353-372 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | The Baranof Fan is one of three large Alaska deep-sea fans that preserve sedimentary records reflecting both tectonic and climatic processes. However, lack of drill sites in the Baranof Fan makes the depositional history across the southeastern Alaska margin still poorly understood. Sequence correlation from the adjacent Surveyor Fan to the Baranof Fan provides updated age constraints on the Baranof Fan evolution history. Results show that both the Baranof and Surveyor Fans are dominantly glacial and initiated ca. 2.8 Ma and expanded rapidly since ca. 1.2 Ma in response to the major glaciation events; these results place the deposition of the Baranof Fan younger than previously thought (ca. 7 Ma). The glacially influenced Baranof Fan contains two sub-fans that are laterally stacked with their depocenters migrating southeastward. Each sub-fan developed multiple channels that young southeastward as channel avulsion, coevolution, and tectonic beheading progressed over the past similar to 2.8 m.y. Tectonic reconstruction suggests that the Baranof Fan is sourced from the Coast Range via shelf-crossing troughs near the Chatham Strait and Dixon Entrance and thus represents a major outflow for the Cordilleran Ice Sheet during glaciations; the Chatham Strait is the major conduit that has fed most of the Baranof Fan channels. Comparatively, the Surveyor Fan is sourced predominantly from the St. Elias Range where a confluence of orogenesis and glaciations are a coupled system and only partly from the Coast Range via the Icy Strait. It is concluded that the formation and expansion of the Cordilleran Ice Sheet has determined the timing of the Baranof Fan deposition, yet Pacific-North America strike-slip motion has influenced the Baranof Fan sediment distribution, as previously suggested, via a series of southeastward avulsing channels and resultant southeastward migration of deep-sea depocenters. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000505809800020 |
WOS关键词 | ST ELIAS OROGEN ; TRANSITION FAULT ; SEA-LEVEL ; SOUTHEASTERN ALASKA ; YAKATAGA FORMATION ; YAKUTAT TERRANE ; BERING TROUGH ; STRIKE-SLIP ; EVOLUTION ; SEDIMENTATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279413 |
专题 | 地球科学 |
作者单位 | 1.Univ Texas Austin, Jackson Sch Geosci, Inst Geophys, JJ Pickle Res Campus Bldg 196,10100 Burnet Rd, Austin, TX 78758 USA; 2.Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA; 3.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Jiajia,Gulick, Sean P. S.. Sequence stratigraphy and depositional history of the Baranof Fan: Insights for Cordilleran Ice Sheet outflow to the Gulf of Alaska[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(1-2):353-372. |
APA | Zhang, Jiajia,&Gulick, Sean P. S..(2020).Sequence stratigraphy and depositional history of the Baranof Fan: Insights for Cordilleran Ice Sheet outflow to the Gulf of Alaska.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(1-2),353-372. |
MLA | Zhang, Jiajia,et al."Sequence stratigraphy and depositional history of the Baranof Fan: Insights for Cordilleran Ice Sheet outflow to the Gulf of Alaska".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.1-2(2020):353-372. |
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